CN104046915A - Large-section high-performance hot work die steel for die casting and preparation technology thereof - Google Patents
Large-section high-performance hot work die steel for die casting and preparation technology thereof Download PDFInfo
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Abstract
The invention relates to large-section high-performance hot work die steel for die casting and a preparation technology thereof and belongs to the technical field of an alloy steel preparation technology. The steel is characterized in that main alloy elements in alloy chemical components comprise, by weight, 0.35-0.65% of C, 0.30-1.00% of Si, 0.30-1.00% of Mn, 3.50-5.50% of Cr, 2.00-3.00% of Mo, 0.40-0.80% of V, P being less than or equal to 0.02%, S being less than or equal to 0.01%, 1.00-2.00% of Ni, Nb being greater than or equal to 0.15%, and the balance Fe. The preparation process of the hot work die steel comprises the following steps: burdening, smelting, casting and electroslag remelting; heat treatment by high-temperature heat diffusion, hot working by multi-directional forging and controlled cooling after forging; refining and heat treatment of proeutectoid carbide and isothermal annealing treatment; and heat treatment by quenching and tempering, namely austenitizing by heating to 950-1100 DEG C, oil cooling or mist cooling, and tempering at 540-630 DEG C for two to three times. The hot work die steel provided by the invention has advantages of high hardenability, high thermal stability, high toughness and good resistance to thermal fatigue.
Description
Technical field
The present invention relates to a kind of hot-work die steel, especially relate to a kind of large section die casting high performance hot-work die steel, also relate to the preparation technology who prepares this hot-work die steel, belong to steel alloy technical field.
Background technology
Hot-work die steel is the die steel using under comparatively high temps, wherein plays the alloying elements such as normally Cr, Mo, W, V of high temperature heat resistance and effect on thermal, and therefore some current research work are mainly the adjustment to these alloying elements.Research is found, the Mo element of high level add thermal fatigue resistance and the anti-temper softening performance that can improve steel, and a certain amount of Ni element add the hardening capacity that can greatly improve steel, the cross section net thickness of this steel is increased greatly, thereby for the manufacture of more heavy in section hot-work die steel, as section thickness is greater than the large section transfer mold of 400mm.In addition, microalloy element Nb adds, and can play the effect of crystal grain thinning, thereby further improves the thermostability of steel and the stability of carbide.
5CrNiMo, 5CrMnMo etc. that the hot-work die steel of the current widespread use of China comprises 4Cr5MoSiV1,3Cr2W8V and is applied to hot-forging die.Although the 3Cr2W8V of tungsten system has higher resistance to tempering and high heat resistance, its plasticity and toughness, thermal conductivity are poor with its thermal fatigue property; The heat resistance of 5CrNiMo and 5CrMnMo is poor, easily causes subsiding of working portion of die; What the Extrusion Die Steel that China is used at present adopted is that in standard GB/T/T1299-2000, grade of steel is 4Cr5MoSiV1.The chemical composition of this Extrusion Die Steel adopts C 0.32-0.45wt%, Cr 4.75-5.50wt%, Mo 1.20-1.75 wt%, V 0.80-1.20 wt%, Si 0.80-1.2wt%, Mn 0.20-0.5wt%, P≤0.03wt%, S≤0.03wt%.4Cr5MoSiV1 steel is present most popular hot-work die steel, but its hot strength is not very high, and general use temperature can not surpass 540 ℃, and thermal fatigue resistance and thermal stability not high.Because the Chemical Composition of this Extrusion Die Steel contains higher molybdenum, chromium and v element and a certain amount of carbon, belong to hypereutectoid steel, therefore the segregation of its material ESR ingot is serious, in tissue after becoming a useful person, there is a large amount of bulk liquation carbide, make the toughness of material not enough, easily occur early stage Cracking Failure.Because this material contains a large amount of secondary hardening elements, easily grow up under condition under arms alligatoring and occurrence type of its tempering state proeutectoid carbide changes, and the alloying element in tempered martensite also easily separates out and reduce the intensity of steel, thereby reduce the high-temperature behavior of steel.The performance index of this steel are: after 1030 ℃ of quenchings and 590～610 ℃ of tempering, Rockwell hardness number is 44-46HRC, notched bar impact strength (" V " type breach) Ak is >=8J that the performance index such as this hardness value and notched bar impact strength are inadequate for the transfer mold of high request.In addition, anti-temper softening ability and thermal fatigue resistance are the important performance indexes of hot-work die steel.
The metallurgical preparation technology of above-mentioned hot-work die steel adopts electrosmelting to add esr, then forges the technique of becoming a useful person.In Qi manufacturing process, electrosmelting adds esr operation and completes the ESR ingot that obtains 500Kg-3000Kg afterwards, through forging machine, forges and becomes a useful person.There are the following problems for this preparation technology: 1) electroslag ingot shape is less, and little ingot shape has reduced the lumber recovery of product and manufactured production capacity; 2) there is a large amount of macrobeads or large block liquation carbide and microstructure segregation in the original structure of ESR ingot, reduced steel ingot and forged the performance index after becoming a useful person; 3) forge after material grains thick, after the tempering that causes quenching, the impelling strength of material is low, product specification is low, cannot meet the needs of market to large section, high tenacity, high heat-intensity hot-work die steel.
Summary of the invention
The technical problem to be solved in the present invention is to provide the hot-work die steel of a kind of large section, high tenacity, high heat-intensity.
For solving the problems of the technologies described above, the technical scheme that large section of the present invention die casting is taked with high performance hot-work die steel is:
A large section die casting high performance hot-work die steel, its innovative point is: in the chemical composition of this high performance hot-work die steel, the mass percent of each main alloy element is:
C 0.45～0.65%， Si 0.30～1.00%，
Mn 0.30～1.00%， Cr 3.50～5.50%，
Mo 2.00～3.00%， V 0.40～0.80%，
Ni 1.00～2.00%， Nb ≥0.15%，
P ≤0.02%， S ≤0.01%
Fe surplus.
On this basis, the die casting of described large section by the mass percent of each main alloy element in high performance hot-work die steel is:
C is that 0.47%, Si is that 0.30%, Mn is that 0.4%, Cr is that 4.80%, Mo is that 2.40%, V is 0.5%, P≤0.007%, S≤0.003%, and Ni is that 1.50%, Nb is 0.18%, Fe surplus.
Another technical problem that the present invention will solve is to provide the preparation technology of high performance hot-work die steel for this large section die casting.
The preparation technology of high performance hot-work die steel for the die casting of described large section, its innovative point is, this technique has following steps:
A. smelt: by large section die casting, by chemical composition and the mass percent of high performance hot-work die steel, prepare burden, electric arc furnace smelting and refining, then carry out secondary esr;
B. High temperature diffusion thermal treatment: Heating temperature is 1180～1280 ℃, soaking time is 10～15h;
C. forge hot-work: will be cooled in 1050～1200 ℃ of temperature ranges and carry out multiway forging processing through the heat treated steel ingot of High temperature diffusion, and adopt two upsettings two to pull out forging mode, and always forge compression ratio >=6, final forging temperature >=900 ℃;
D. cooling after forging: after forging, to adopt water-cooled or mist cold, guarantee that forging is cooling fast to be greater than the speed of cooling of 0.05 ℃/s, drop to 200 ℃ of following dress Annealing furnace to temperature;
E. proeutectoid carbide refinement thermal treatment: Heating temperature is 950～1150 ℃, soaking time is 5～10h, is then quickly cooled to below 250 ℃, then send annealing furnace;
F. isothermal spheroidizing is processed: first stage isothermal annealing temperature is 830～850 ℃, and annealing time is 5～10h; Subordinate phase isothermal annealing temperature is 730～750 ℃, and annealing time is 5～10h;
G. quenching and tempering thermal treatment: be heated to 950～1100 ℃, adopt oil cooling or water smoke to be cooled to below 250 ℃; Carry out subsequently 540～630 ℃ of temper, tempering 2～3 times, each tempering insulation 2～4 hours.
On this basis, in described High temperature diffusion heat treatment step, in temperature-rise period, adopt classification to heat up.
On this basis, in described quenching and tempering heat treatment step, quenching temperature is 1030 ℃, tempering twice, and each 2h, tempering temperature is 610 ℃.
The invention has the beneficial effects as follows: this hot-work die steel is compared with general H13 hot-work die steel, has suitably improved carbon content, has increased Mo content simultaneously, and added the alloying element Ni that improves hardening capacity, increased micro alloying element Nb.
1), improve a certain amount of carbon and be conducive to improve the hardening capacity of steel and urge rigidly, improve the working strength of steel;
2), the content that improves Mo element is conducive to improve thermostability and the heat resistance of steel, improves the heat-resistant anti-fatigue performance of steel simultaneously;
3), Ni is austenite stabilizer element, can greatly improve the hardening capacity of steel and improve the toughness of steel, and the free area thickness of the mould of this steel processing is increased substantially, and realizes mold sections super large;
4), the adding of microalloy Nb element, can crystal grain thinning and improve the thermostability of steel, thus improve the applied at elevated temperature performance of steel;
5) although, manganese element is weak carbide forming element, can not form carbide reinforced effect, adding of a certain amount of manganese element can promote the decomposition of cementite and postpone separating out and growing up of carbide, is conducive to the thermostability of steel.In addition, manganese element can cause the content of the residual austenite in steel to increase with stable, can improve like this toughness and the thermal fatigue resistance of steel;
6), element silicon is the effective element that improves resistance to tempering, the content that improves element silicon in steel is mainly can be so that steel martensitic decomposition in the process of tempering slows down, element silicon can effectively hinder at austenite martensitic decomposition in the drawing process after martensitic transformation, this is mainly by suppressing growing up and expanding ε-carbide stable region of ε-carbide particle, having postponed the transformation of ε-carbide to θ-carbide.Silicon is postponed ε → θ and is changed, and can fully reduce the growth rate of cementite in drawing process in steel, and Siliciumatom is separated out mutually and forms mutually the enrichment region of Siliciumatom around at θ from θ, suppresses the alligatoring of growing up of θ phase; Element silicon effectively improves the anti-temper softening ability of steel in addition;
7), in drawing process, V can reduce martensitic decomposition rate, has postponed austenitic transformation, and V-arrangement becomes the proeutectoid carbide of MC type, small and dispersed, is difficult for agglomeration, in drawing process, strengthen age hardening effect, improved greatly thermostability and the impelling strength of steel.Therefore, the content of V in steel is controlled between 0.4～0.8%, gives full play to the alloying action of V;
8), Cr main Cr23C6 type carbide that forms in hot working die steel, play strengthening effect, improve the intensity of steel;
9), this hot-work die steel is after above-mentioned thermal treatment, its hardening capacity, thermostability, impelling strength and thermal fatigue property are better than H13 steel.
Accompanying drawing explanation
Figure 1 shows that the large section die casting tempering characteristics graphic representation of high performance hot-work die steel after 1030 ℃ of quenchings of embodiment 1.
Figure 2 shows that the annealed structure figure of high performance hot-work die steel for the large section die casting of embodiment 1.
Figure 3 shows that large section die casting thermal stability data contrast under 620 ℃ of conditions with high performance hot-work die steel and H13 steel of embodiment 1.
Figure 4 shows that the thermal fatigue surface topography map of high performance hot-work die steel for the large section die casting of embodiment 1.
Figure 5 shows that the large section die casting tempering characteristics graphic representation of high performance hot-work die steel after 1030 ℃ of quenchings of embodiment 2.
Figure 6 shows that the annealed structure figure of high performance hot-work die steel for the large section die casting of embodiment 2.
Figure 7 shows that large section die casting thermal stability data contrast under 620 ℃ of conditions with high performance hot-work die steel and H13 steel of embodiment 2.
Figure 8 shows that the thermal fatigue surface topography map of high performance hot-work die steel for the large section die casting of embodiment 2.
Figure 9 shows that the large section die casting tempering characteristics graphic representation of high performance hot-work die steel after 1030 ℃ of quenchings of embodiment 3.
Figure 10 shows that the annealed structure figure of high performance hot-work die steel for the large section die casting of embodiment 3.
Figure 11 shows that large section die casting thermal stability data contrast under 620 ℃ of conditions with high performance hot-work die steel and H13 steel of embodiment 3.
Figure 12 shows that the thermal fatigue surface topography map of high performance hot-work die steel for the large section die casting of embodiment 3.
Figure 13 shows that the tempering characteristics graphic representation of comparative example H13 steel after 1030 ℃ of quenchings.
Figure 14 shows that the annealed structure figure of comparative example H13 steel.
Figure 15 shows that the thermal fatigue surface topography map of comparative example H13 steel.
Figure 16 shows that the hot fatigue performance test surface topography map of comparative example H13 steel.
Embodiment
In order to make object of the present invention, technical scheme and advantage more cheer and bright, the present invention is described further technical scheme of the present invention with following specific embodiment, but the invention is not restricted to following specific embodiment.
embodiment 1
in the present embodiment, moiety and mass percent thereof that large section die casting adopts with high performance hot-work die steel are as follows:
C 0.65%， Si 1.00%， Mn 1.00%， Cr 5.50%，
Mo 3.00%， V 0.80%， P 0.015%, S 0.007%,
Ni 2.00%, and Nb 0.20%, Fe surplus.
Technological process and the step of with the material in this embodiment, producing hot-work die steel are as follows:
A electrosmelting: carry out melting by the alloying element proportioning in the various embodiments described above in electric arc furnace, smelting temperature is greater than 1500 ℃, is cast into φ 400mm～φ 450mm electrode bar air cooling.
B esr: be positioned over the steel ingot after pouring as consumable electrode in esr device, carry out esr, change slag voltage 56～62V, voltage 57～the 59V of electric current 3000～5000A, electricity consumption system, electric current 11000～12000A, voltage 57～59V binds, current time 35～50Min, esr forms ESR ingot.
C High temperature diffusion thermal treatment: divide stepped heating by the ESR ingot after esr, guarantee that ESR ingot internal and external temperature is even, respectively at 600 ℃, 800 ℃ and 1100 ℃ of isothermal heating, be heated to 1180-1280 ℃ and carry out High temperature diffusion thermal treatment, be incubated 10～15 hours, uniform formation, improves alloying constituent segregation and eliminates liquation carbide; In this step, in order to reduce, because temperature is too low, make High temperature diffusion thermal treatment inhomogeneous, and the too short coring that makes of time is insufficient, so preferred High temperature diffusion thermal treatment temp is 1240～1260 ℃, soaking time 15h.
D forges processing: the steel ingot temperature after above-mentioned high temperature expanding thermal treatment is adjusted in 1050-1200 ℃ of temperature range and carries out multiway forging processing; The forging mode that adopts two upsettings two to pull out, always forges compression ratio >=6, final forging temperature >=900 ℃.
Cooling after E forges: after forging, to adopt water-cooled or mist cold, guarantee that forging is cooling fast to be greater than the speed of cooling of 0.05 ℃/s, drop to 200 ℃ of following dress Annealing furnace to temperature.
F proeutectoid carbide refinement thermal treatment: Heating temperature is 950～1150 ℃, soaking time is 5～10h, then adopts the mode of oil cooling or water-cooled that ESR ingot is quickly cooled to below 250 ℃, then send annealing furnace; In order to make refinement more fully completely, in this step, Heating temperature is preferably 1100 ℃, and soaking time is 10h.
G isothermal spheroidizing is processed: first stage isothermal annealing temperature is 830～850 ℃, and annealing time is 5～10h; Subordinate phase isothermal annealing temperature is 730～750 ℃, and annealing time is 5～10h; Then cool to room temperature with the furnace; In order to reduce energy consumption, the annealing time of the first stage of this step is 6h, and the annealing time of subordinate phase is 10h.
The thermal treatment of H quenching and tempering: 950～1100 ℃ of quenching temperatures, adopt the mode of oil cooling or water-cooled to quench, at 540～630 ℃, carry out 2～3 tempering, each tempering insulation time is 2～4 hours; In order to reduce energy consumption, can guarantee quenching and tempering effect again, in this step, quenching temperature is selected 1030 ℃ simultaneously, and tempering temperature is 610 ℃, tempering twice, and each time is 2h.
Hot-work die steel of the present invention is after above-mentioned smelting and hot-work and thermal treatment, and final finished specification is 500mm*800mm*4000mm module, and performance test is carried out in sampling, and analytical results is:
A transformation temperature:
Ac1, Ac3 and Ms point test result are respectively 830 ℃, 960 ℃ and 305 ℃.
B tempering characteristics:
The rational curve that tempered-hardness after 1030 ℃ of quenchings changes with tempering temperature as shown in Figure 1.
C hardness test:
Quenching hardness: 56.2HRC; Tempered-hardness: 52HRC.
D annealed structure:
The annealed structure of hot-work die steel of the present invention as shown in Figure 2.
The experiment of D impelling strength:
According in North America die casting association criterion (NADCA#207-2006) about the requirement of impact ductility test, on blank, get lateral impact sample, specimen size is 7mm * 10mm * 55mm.
Impact toughness value: >=280J during room temperature (20 ℃).
E thermostability:
Hot-work die steel of the present invention carries out stability contrast experiment with H13 steel under 620 ℃ of conditions, and H13 steel, through making its hardness value the same with steel of the present invention after the temper of quenching, is 50HRC, and test-results as shown in Figure 3.From accompanying drawing 3, although that experiment starts front hot-work die steel of the present invention is consistent with H13 steel hardness value, at 620 ℃, from carrying out 20 hours thermostabilitys, test changes in hardness situation, hot-work die steel of the present invention is better than H13 steel.
F hot fatigue performance test:
Under room temperature (20 ℃)～700 ℃ of conditions, carry out cold cycling, after 3000 cold cycling, the thermal fatigue surface topography of large section of the present invention die casting use high performance hot-work die steel as shown in Figure 4.As seen from Figure 4, after hot-work die steel thermal fatigue test of the present invention, surface crack is very even, tiny, does not see from the teeth outwards the formation of larger main crackle.The two contrast can find out, the thermal fatigue property of hot-work die steel of the present invention is better than H13 steel.
embodiment 2
In the present embodiment, moiety and mass percent thereof that large section die casting adopts with high performance hot-work die steel are as follows:
C 0.47%， Si 0.30%， Mn 0.40%， Cr 4.80%，
Mo 2.40%， V 0.50%， P 0.007%， S 0.003%，
Ni 1.50%, and Nb 0.18%, Fe surplus.
Adopt material in this embodiment to produce the technological process of hot-work die steel and step as follows with embodiment 1, repeat no more herein.
The present embodiment hot-work die steel is after above-mentioned smelting and hot-work and thermal treatment, and final finished specification is 500mm*800mm*4000mm module, and performance test is carried out in sampling, and analytical results is:
A transformation temperature:
Ac1, Ac3 and Ms point test result are respectively 831 ℃, 957 ℃ and 307 ℃.
B tempering characteristics:
The rational curve that tempered-hardness after 1030 ℃ of quenchings changes with tempering temperature as shown in Figure 5.
C hardness test:
Quenching hardness: 56.5HRC; Tempered-hardness: 51.5HRC.
D annealed structure:
The annealed structure of hot-work die steel of the present invention as shown in Figure 6.
The experiment of D impelling strength:
According in North America die casting association criterion (NADCA#207-2006) about the requirement of impact ductility test, on blank, get lateral impact sample, specimen size is 7mm * 10mm * 55mm.
Room temperature (20 ℃) impact toughness value: >=280J.
E thermostability:
Hot-work die steel of the present invention carries out stability contrast experiment with H13 steel under 620 ℃ of conditions, and H13 steel, through making its hardness value the same with steel of the present invention after the temper of quenching, is 50HRC, and test-results as shown in Figure 7.From accompanying drawing 7, although that experiment starts front hot-work die steel of the present invention is consistent with H13 steel hardness value, at 620 ℃, from carrying out 20 hours thermostabilitys, test changes in hardness situation, hot-work die steel of the present invention is better than H13 steel.
F hot fatigue performance test:
Under room temperature (20 ℃)～700 ℃ of conditions, carry out cold cycling, after 3000 cold cycling, the thermal fatigue surface topography of high performance hot-work die steel as shown in Figure 88 for the die casting of large section of the present invention.As seen from Figure 8, after hot-work die steel thermal fatigue test of the present invention, surface crack is very even, tiny, does not see from the teeth outwards the formation of larger main crackle.The two contrast can find out, the thermal fatigue property of hot-work die steel of the present invention is better than H13 steel.
embodiment 3
In the present embodiment, moiety and mass percent thereof that large section die casting adopts with high performance hot-work die steel are as follows:
C 0.45%， Si 0.50%， Mn 0.70%， Cr 3.50%，
Mo 2.00%， V 0.60%， P 0.001%， S 0.005%，
Ni 1.00%, and Nb 0.17%, Fe surplus.
Adopt material in this embodiment to produce the technological process of hot-work die steel and step with embodiment 1, repeat no more herein.
Hot-work die steel of the present invention is after above-mentioned smelting and hot-work and thermal treatment, and final finished specification is 500mm*800mm*4000mm module, and performance test is carried out in sampling, and analytical results is:
A transformation temperature:
Ac1, Ac3 and Ms point test result are respectively 831 ℃, 962 ℃ and 306 ℃.
B tempering characteristics:
The rational curve that tempered-hardness after 1030 ℃ of quenchings changes with tempering temperature as shown in Figure 9.
C hardness test:
Quenching hardness: 56HRC; Tempered-hardness: 52HRC.
D annealed structure:
The annealed structure of hot-work die steel of the present invention as shown in Figure 10.
The experiment of D impelling strength:
According in North America die casting association criterion (NADCA#207-2006) about the requirement of impact ductility test, on blank, get lateral impact sample, specimen size is 7mm * 10mm * 55mm.
Room temperature (20 ℃) impact toughness value: >=280J.
E thermostability:
Hot-work die steel of the present invention carries out stability contrast experiment with H13 steel under 620 ℃ of conditions, and H13 steel, through making its hardness value the same with steel of the present invention after the temper of quenching, is 50HRC, and test-results as shown in Figure 11.From accompanying drawing 11, although that experiment starts front hot-work die steel of the present invention is consistent with H13 steel hardness value, at 620 ℃, from carrying out 20 hours thermostabilitys, test changes in hardness situation, hot-work die steel of the present invention is better than H13 steel.
F hot fatigue performance test:
Under room temperature (20 ℃)～700 ℃ of conditions, carry out cold cycling, after 3000 cold cycling, the thermal fatigue surface topography of large section of the present invention die casting use high performance hot-work die steel as shown in Figure 12.As seen from Figure 12, after hot-work die steel thermal fatigue test of the present invention, surface crack is very even, tiny, does not see from the teeth outwards the formation of larger main crackle.The two contrast can find out, the thermal fatigue property of hot-work die steel of the present invention is better than H13 steel.
comparative example
H13 moiety and mass percent thereof are as follows:
C is that 0.39%, Si is that 1.00%, Mn is that 0.40%, Cr is that 5.20%, Mo is that 1.40%, V is that 0.90%, P is that 0.025%, S is 0.003%, Fe surplus.
The preparation of employing ordinary method, final finished specification is 500mm*800mm*4000mm module, sampling analysis:
A transformation temperature:
Ac1, Ac3 and Ms point test result are respectively 820 ℃, 890 ℃ and 340 ℃.
B tempering characteristics:
The rational curve that tempered-hardness after 1030 ℃ of quenchings changes with tempering temperature as shown in Figure 13.
C hardness test:
Quenching hardness: 52HRC; Tempered-hardness: 48HRC.
D annealed structure:
The annealed structure of hot-work die steel of the present invention as shown in Figure 14.
The experiment of D impelling strength:
According in North America die casting association criterion (NADCA#207-2006) about the requirement of impact ductility test, on blank, get lateral impact sample, specimen size is 7mm * 10mm * 55mm.
Room temperature (20 ℃) impact toughness value: >=280J.
E thermostability:
Under 620 ℃ of conditions, H13 steel carries out stability contrast experiment, and H13 steel is 48HRC through making its hardness value after the temper of quenching, and test-results as shown in Figure 15.
F hot fatigue performance test:
Under room temperature (20 ℃)～700 ℃ of conditions, carry out cold cycling, after 3000 cold cycling, the thermal fatigue surface topography of H13 steel as shown in Figure 16.
Claims (5)
1. a large section die casting high performance hot-work die steel, it is characterized in that: in the chemical composition of described steel, the mass percent of each main alloy element is: C is that 0.45～0.65%, Si is that 0.30～1.00%, Mn is 0.30～1.00%, Cr is 3.50～5.50%, Mo is that 2.00～3.00%, V is 0.40～0.80%, P≤0.02%, S≤0.01%, Ni is that 1.00～2.00%, Nb is >=0.15%, and surplus is Fe.
2. die casting high performance hot-work die steel in large section according to claim 1, it is characterized in that: this large section die casting by the mass percent of each main alloy element in the chemical composition of high performance hot-work die steel is: C is that 0.47%, Si is that 0.30%, Mn is 0.4%, Cr is 4.80%, Mo is that 2.40%, V is 0.5%, P≤0.007%, S≤0.003%, Ni is that 1.50%, Nb is 0.18%, and surplus is Fe.
3. the preparation technology of high performance hot-work die steel for the die casting of large section according to claim 1 and 2, it is characterized in that: comprise smelting, High temperature diffusion thermal treatment, forge hot-work, cooling after forging, proeutectoid carbide refinement thermal treatment, isothermal spheroidizing are processed, quenching and tempering thermal treatment, concrete steps are as follows:
Smelt: by large section die casting, by chemical composition and the mass percent of high performance hot-work die steel, prepare burden, electric arc furnace smelting and refining, then carry out secondary esr;
High temperature diffusion thermal treatment: Heating temperature is 1180～1280 ℃, soaking time is 10～15h;
Forge hot-work: will be cooled in 1050～1200 ℃ of temperature ranges and carry out multiway forging processing through the heat treated steel ingot of High temperature diffusion, and adopt two upsettings two to pull out forging mode, and always forge compression ratio >=6, final forging temperature >=900 ℃;
Cooling after forging: after forging, to adopt water-cooled or mist cold, guarantee that forging is cooling fast to be greater than the speed of cooling of 0.05 ℃/s, drop to 200 ℃ of following dress Annealing furnace to temperature;
Proeutectoid carbide refinement thermal treatment: Heating temperature is 950～1150 ℃, soaking time is 5～10h, is then quickly cooled to below 250 ℃, then send annealing furnace;
Isothermal spheroidizing is processed: first stage isothermal annealing temperature is 830～850 ℃, and annealing time is 5～10h; Subordinate phase isothermal annealing temperature is 730～750 ℃, and annealing time is 5～10h;
Quenching and tempering thermal treatment: be heated to 950～1100 ℃, adopt oil cooling or water smoke to be cooled to below 250 ℃; Carry out subsequently 540～630 ℃ of temper, tempering 2～3 times, each tempering insulation 2～4 hours.
4. the preparation technology of high performance hot-work die steel for the die casting of large section according to claim 3, is characterized in that: in described High temperature diffusion heat treatment step, adopt classification to heat up in temperature-rise period.
5. the preparation technology of high performance hot-work die steel for the die casting of large section according to claim 4, and be characterised in that: in described quenching and tempering heat treatment step, quenching temperature is 1030 ℃, tempering twice, and each 2h, tempering temperature is 610 ℃.
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| CN110484812A (en) * | 2019-04-29 | 2019-11-22 | 如皋市宏茂重型锻压有限公司 | A kind of high-performance hot stamping die steel and its manufacturing process |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85100822A (en) * | 1985-04-01 | 1985-10-10 | 华中工学院 | Hot-work die steel |
| EP0939140A1 (en) * | 1998-02-27 | 1999-09-01 | BÖHLER Edelstahl GmbH | Steel for use at high temperatures |
| JP2005171305A (en) * | 2003-12-10 | 2005-06-30 | Sanyo Special Steel Co Ltd | Prehardend die steel |
| CN103334054A (en) * | 2013-06-18 | 2013-10-02 | 上海大学 | Economical aluminium-containing hot extrusion mold steel and preparation, heat treatment and surface treatment method thereof |
| CN103334061A (en) * | 2013-06-18 | 2013-10-02 | 上海大学 | Die-casting die steel with high heat conductivity and large section and preparation and heat treatment method thereof |
-
2014
- 2014-04-28 CN CN201410171884.7A patent/CN104046915B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85100822A (en) * | 1985-04-01 | 1985-10-10 | 华中工学院 | Hot-work die steel |
| EP0939140A1 (en) * | 1998-02-27 | 1999-09-01 | BÖHLER Edelstahl GmbH | Steel for use at high temperatures |
| JP2005171305A (en) * | 2003-12-10 | 2005-06-30 | Sanyo Special Steel Co Ltd | Prehardend die steel |
| CN103334054A (en) * | 2013-06-18 | 2013-10-02 | 上海大学 | Economical aluminium-containing hot extrusion mold steel and preparation, heat treatment and surface treatment method thereof |
| CN103334061A (en) * | 2013-06-18 | 2013-10-02 | 上海大学 | Die-casting die steel with high heat conductivity and large section and preparation and heat treatment method thereof |
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| CN104498685A (en) * | 2014-12-09 | 2015-04-08 | 通裕重工股份有限公司 | Heat-treating process for hot-working die steel forgings |
| CN105274437A (en) * | 2015-10-08 | 2016-01-27 | 如皋市宏茂重型锻压有限公司 | Thermal fatigue resisting and high performance hot working die steel and manufacturing process thereof |
| JP2019505674A (en) * | 2015-12-24 | 2019-02-28 | ロバルマ, ソシエダッド アノニマRovalma, S.A. | Long-term durable high performance steel for structural, mechanical and tool applications |
| CN105463333A (en) * | 2016-01-29 | 2016-04-06 | 山东华民钢球股份有限公司 | Steel for liner plate forging die, liner plate forging die and preparation method thereof |
| CN107345267A (en) * | 2016-05-05 | 2017-11-14 | 中国科学院金属研究所 | A kind of high-performance TBM disk cutter Technologies for Heating Processing |
| CN107345267B (en) * | 2016-05-05 | 2019-03-29 | 中国科学院金属研究所 | A kind of high-performance TBM disk cutter heat treatment process |
| CN105950962A (en) * | 2016-05-09 | 2016-09-21 | 天津钢研海德科技有限公司 | High-temperature-resistant and high-toughness hot work die steel and preparation method thereof |
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| CN106048436A (en) * | 2016-07-01 | 2016-10-26 | 宜兴市凯诚模具有限公司 | Cast steel forming die and preparing method thereof |
| CN106086688A (en) * | 2016-08-29 | 2016-11-09 | 营口市特殊钢锻造有限责任公司 | A kind of Cr3 series hot die steel and heat treatment method thereof |
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| CN106222543B (en) * | 2016-08-29 | 2018-10-09 | 营口市特殊钢锻造有限责任公司 | A kind of Cr1 series hot die steel and its heat treatment method |
| CN106566914A (en) * | 2016-11-02 | 2017-04-19 | 北京科技大学 | Heat treatment method for tool and mould steel obtained after electroslag remelting continuous directional solidification |
| CN108103277A (en) * | 2016-11-24 | 2018-06-01 | 丹阳市宏光机械有限公司 | A kind of heat treatment process after mould steel electroslag remelting continuous directional solidification |
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| CN107686878B (en) * | 2017-03-30 | 2018-10-19 | 山西同航特钢有限公司 | A kind of manufacturing process of hot-work die steel forgings |
| CN107653416A (en) * | 2017-08-10 | 2018-02-02 | 唐山志威科技有限公司 | One kind has high tenacity, high iso advanced hot die steel |
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| CN109182669A (en) * | 2018-11-22 | 2019-01-11 | 钢铁研究总院 | High hardness high toughness easily welds pre-hardening plastic die steel and preparation method thereof |
| CN109487166A (en) * | 2018-12-21 | 2019-03-19 | 北京科技大学 | A kind of high strength at high temperature low-carbon heated die steel and preparation method thereof |
| CN109852880A (en) * | 2019-01-10 | 2019-06-07 | 上海大学 | A kind of high heat-intensity hot-work die steel and its manufacturing method |
| CN110484812A (en) * | 2019-04-29 | 2019-11-22 | 如皋市宏茂重型锻压有限公司 | A kind of high-performance hot stamping die steel and its manufacturing process |
| CN110016619A (en) * | 2019-05-28 | 2019-07-16 | 营口市特殊钢锻造有限责任公司 | A kind of mining High Strength Wear-Resistance Material and preparation method thereof |
| CN113939604A (en) * | 2019-06-06 | 2022-01-14 | 日立金属株式会社 | Steel for hot stamping die, and method for producing same |
| CN111020382B (en) * | 2019-12-10 | 2022-04-15 | 上海始金新材料科技有限公司 | High-thermal-stability die-casting die steel and preparation method thereof |
| CN111020382A (en) * | 2019-12-10 | 2020-04-17 | 上海始金新材料科技有限公司 | High-thermal-stability die-casting die steel and preparation method thereof |
| CN111889990A (en) * | 2020-06-24 | 2020-11-06 | 如皋市宏茂铸钢有限公司 | Thermal fatigue resistant high-performance hot work die steel and manufacturing process thereof |
| CN111889990B (en) * | 2020-06-24 | 2021-05-04 | 如皋市宏茂铸钢有限公司 | Thermal fatigue resistant high-performance hot work die steel and manufacturing process thereof |
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| CN111733312B (en) * | 2020-08-12 | 2021-06-22 | 燕山大学 | Heat treatment process for improving comprehensive mechanical property of H13 steel |
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| CN114086067A (en) * | 2021-11-15 | 2022-02-25 | 宿迁学院 | Martensite hot-work die steel and preparation method thereof |
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| CN115094204A (en) * | 2022-07-18 | 2022-09-23 | 重庆齿轮箱有限责任公司 | Heat treatment method of medium carbon alloy steel |
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